Block and Brick Ledge

Sorry for the repost. I should have posted this under Masonry the first time.

I'm building a block porch foundation in well drained soil. It will be about 4 courses. I want to add brick to the front exposed part of the foundation wall just under the slab. I have plenty of 8" block left over from a previous project. Instead of buying two courses of 10" block, I was wondering if I could do one course of 8", a course of 10" to use as the brick ledge, and then the remaining two courses in 8"? That would save me a course of 10" block. But, I don't want to be cheap if it will cause problems later.

All courses would be bonded and rebarred. I can't think of any reason this wouldn't work. Anyone ever try this?

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Block and Brick Ledge

I know 2" wasn't much, but since this was mostly going to be below grade, I was thinking ground forces would keep it tight at the bottom and it would be tied at the top near the exposed 2 courses of the total 4. Anyway, that was my thinking.

I like the 4" block idea. But, is that enough support for a concrete slab?
4" would be cheaper and easier to transport. I probably could do the bottom 2 courses in 4" to support the brick next to the 8" block.

Someone suggested using 8" block cross ways for the second course. I have plenty of 8" block and wouldn't have to buy anything. It would also be balanced better. It seems like a good solution or is there something I'm missing?